title: A quest for supramolecular gelators: silver(I) complexes with quinoline-urea derivatives.
abstract: The quinoline urea derivatives 1,3-di(quinolin-5-yl)urea (DQ5U), 1-phenyl-3-(quinolin-6-yl)urea (PQ6U), 1-(isoquinolin-5-yl)-3-phenylurea (PiQ5U) and 1-phenyl-3-(3,5-bis(pyrid-2-yl)-1,2,4-triazol-4-yl)urea (PPT4U) have been synthesised and structurally characterized by powder and single crystal X-ray diffraction. Their gelator behaviour in the formation of Ag-complexes has been explored. Compound DQ5U proved capable of gelating the mixed solvent EtOH-DMF 1 : 2 (v/v) when mixed with 1 equivalent of AgNO3. In the case of PQ6U, two polymorphic forms of the complex [Ag(PQ6U)2]NO3, plus the solvated form [Ag(PQ6U)2]NO3·CH3CN, were crystallized. Photophysical characterization of the ligands has been conducted in solution, while fluorescence microscopy has been used to examine the microstructure and photophysical properties of the gels formed by PQ5U and DQ5U with AgNO3.
authors.affiliation: Dipartimento di Chimica G. Ciamician, Università di Bologna, Via Selmi 2, 40126 Bologna, Italy. fabrizia.grepioni@unibo.it.
authors.forename: Dario
authors.initials: D
authors.lastname: Braga
authors.forename: Simone
authors.initials: S
authors.lastname: d'Agostino
authors.forename: Eros
authors.initials: E
authors.lastname: D'Amen
authors.forename: Fabrizia
authors.initials: F
authors.lastname: Grepioni
authors.forename: Damiano
authors.initials: D
authors.lastname: Genovese
authors.forename: Luca
authors.initials: L
authors.lastname: Prodi
authors.forename: Massimo
authors.initials: M
authors.lastname: Sgarzi
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005782:Gels / Q000737:chemistry*; D008958:Models, Molecular; D011804:Quinolines / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D014508:Urea / Q000031:analogs & derivatives*
chemical_list: D056831:Coordination Complexes; D005782:Gels; D011804:Quinolines; D012834:Silver; D014508:Urea; C037219:quinoline